CN112485988B - Recording medium detection apparatus and image forming apparatus - Google Patents

Recording medium detection apparatus and image forming apparatus Download PDF

Info

Publication number
CN112485988B
CN112485988B CN202010933991.4A CN202010933991A CN112485988B CN 112485988 B CN112485988 B CN 112485988B CN 202010933991 A CN202010933991 A CN 202010933991A CN 112485988 B CN112485988 B CN 112485988B
Authority
CN
China
Prior art keywords
recording medium
roller
displacement
detection
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010933991.4A
Other languages
Chinese (zh)
Other versions
CN112485988A (en
Inventor
泉宫由美子
小片智史
吉村和俊
浅野齐
关裕正
石川明正
菅野雅至
米山刚
丸山宏之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Publication of CN112485988A publication Critical patent/CN112485988A/en
Application granted granted Critical
Publication of CN112485988B publication Critical patent/CN112485988B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6529—Transporting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/70—Detecting malfunctions relating to paper handling, e.g. jams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/006—Means for preventing paper jams or for facilitating their removal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/068—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between one or more rollers or balls and stationary pressing, supporting or guiding elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/14—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors by photoelectric feelers or detectors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5029—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the copy material characteristics, e.g. weight, thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/134—Axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/144—Roller pairs with relative movement of the rollers to / from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/152—Arrangement of roller on a movable frame
    • B65H2404/1521—Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/152—Arrangement of roller on a movable frame
    • B65H2404/1522—Arrangement of roller on a movable frame moving linearly in feeding direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance
    • B65H2511/224—Nip between rollers, between belts or between rollers and belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/515—Absence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5062—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the characteristics of an image on the copy material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00738—Detection of physical properties of sheet thickness or rigidity

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

The present disclosure provides a recording medium detection apparatus and an image forming apparatus. The recording medium detection apparatus includes: roller 1 and roller 2 for holding and conveying the recording medium; a roller shaft for rotatably supporting the 2 nd roller; and a shaft support portion and a displacement detection portion. The shaft support portion supports the roller shaft so as to be movable in a thickness direction of the recording medium. The displacement detection unit detects the displacement of the 2 nd roller in the thickness direction. The shaft support section also supports the 2 nd roller via the roller shaft so as to be movable in the conveying direction of the recording medium.

Description

Recording medium detection apparatus and image forming apparatus
Technical Field
The present invention relates to a recording medium detection apparatus that detects the thickness and type of a recording medium, and an image forming apparatus including the recording medium detection apparatus.
Background
An image forming system includes: an image forming apparatus that forms an image on a recording medium such as paper; and a recording medium supply device for supplying the recording medium to the image forming device. In addition, in the image forming apparatus, an image is formed on the recording medium based on the output job information. In addition, the image forming apparatus is provided with a recording medium detecting device for detecting the size and type of the recording medium before forming an image on the recording medium.
As a conventional recording medium detection apparatus of this kind, for example, there is an example described in patent document 1. Patent document 1 describes a technique including: a paper thickness detection roller pair having a 1 st roller and a 2 nd roller that sandwich the recording medium; and a displacement sensor for detecting the thickness of the paper based on the displacement of the paper thickness detection roller pair which rotates with respect to the recording medium.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2018-118811
Disclosure of Invention
However, in the technique described in patent document 1, in order to form a nip portion for nipping the recording medium, the 2 nd roller is biased toward the 1 st roller. Therefore, when the recording medium enters the nip between the 1 st roller and the 2 nd roller, a load is applied to the recording medium from the 1 st roller and the 2 nd roller, and there is a possibility that a jam may occur in the recording medium.
In view of the above-described conventional problems, an object of the present invention is to provide a recording medium detection apparatus and an image forming apparatus capable of suppressing a recording medium jam.
In order to solve the above problems and achieve the object of the present invention, a recording medium detection apparatus includes: a 1 st roller and a 2 nd roller for nipping and conveying the recording medium; a roller shaft rotatably supporting the 2 nd roller; a shaft support portion; and a displacement detection unit. The shaft support portion supports the 2 nd roller via the roller shaft so as to be movable in the thickness direction of the recording medium. The displacement detection unit detects the displacement of the 2 nd roller in the thickness direction of the recording medium. The shaft support section also supports the 2 nd roller via a roller shaft so as to be movable in the conveying direction of the recording medium.
The image forming apparatus of the present invention includes: an image forming unit that forms an image on a recording medium; and a recording medium detection device that detects the recording medium, the recording medium detection device being disposed upstream of the image forming section in the conveying direction of the recording medium. As the recording medium detection apparatus, the above-described recording medium detection apparatus is applied.
According to the recording medium detection apparatus and the image forming apparatus having the above-described configuration, occurrence of a jam in the recording medium can be suppressed.
Drawings
Fig. 1 is a schematic configuration diagram showing an overall configuration of an image forming system according to an example of embodiment of the present invention.
Fig. 2 is a block diagram showing a hardware configuration of an image forming system according to an embodiment example of the present invention.
Fig. 3 is a schematic configuration diagram of a recording medium detection apparatus according to an example of embodiment of the present invention.
Fig. 4 is a perspective view showing a 1 st detection unit in the recording medium detection apparatus according to the embodiment example of the present invention.
Fig. 5 is a perspective view showing a driven roller in the recording medium detecting apparatus according to the embodiment example of the present invention.
Fig. 6 is an explanatory diagram showing a state in which the roller shaft in the recording medium detection section is displaced in the conveying direction in the embodiment example of the present invention.
Fig. 7 is an explanatory view showing a state in which a roller shaft in a recording medium detecting section of an example of the embodiment of the present invention is displaced in a conveying direction.
Fig. 8 is an explanatory diagram showing a positional relationship of the driven roller, the urging member, and the detection point in the recording medium detection section according to the embodiment example of the present invention.
Fig. 9 is an explanatory diagram showing another example of the positional relationship of the driven roller, the urging member, and the detection point according to the embodiment of the present invention.
(symbol description)
1: an image forming system; 10: a paper feed unit; 20: an image forming apparatus; 50: paper detection means (recording medium detection means); 51: a 1 st detection unit; 52: a 2 nd detection unit; 53: a Basis Weight (Basis Weight) detection unit; 54: a surface characteristic detection unit; 57: a conveying roller; 58: a guide plate; 61: a drive roller (roller 1); 62: driven roller (roller 2); 63: a displacement detection unit; 64: a clamping part; 66: roll shafts (displacement members); 66a: a planar portion; 67: a shaft support portion; 67a: a support hole; 68: a force application member; 71: a light receiving section; 72: a 1 st light emitting unit; 73: a 2 nd light emitting unit; 81: a detection rod; 82: a support section; 250: a memory (storage section); 260: an image processing section; 270: an image forming section; 290: reverse conveyance unit, P1: and detecting a point.
Detailed Description
Hereinafter, a mode for implementing the recording medium detecting apparatus and the image forming apparatus according to the present invention will be described with reference to fig. 1 to 9. In the drawings, common components are denoted by the same reference numerals. The present invention is not limited to the following embodiments.
1. Description of the embodiments
1-1 Structure of image Forming System
First, an overall configuration of an image forming system according to an embodiment of the present invention (hereinafter referred to as "this example") will be described. Fig. 1 is a schematic configuration diagram of an image forming system 1 of the present example.
As shown in fig. 1, the image forming system 1 has an image forming apparatus 20 and a paper feed unit 10 for feeding a sheet S representing one example of a recording medium. The paper feeding unit 10 and the image forming apparatus 20 are connected to a network such as a LAN, and are connected to each other via the network. The image forming system 1 is configured such that the sheet feeding units 10 and the image forming apparatuses 20 are arranged in this order from the upstream side of the conveyance path of the sheet S, and the sheet feeding units 10 and the image forming apparatuses 20 are connected in series.
The paper feed unit 10 is disposed at the most upstream of the image forming system 1. The paper feed unit 10 is configured to: the sheet feeder includes a plurality of sheet feed trays, and can accommodate a large number of sheets. The sheet feeding unit 10 feeds the sheet S stored in the sheet feeding tray to the image forming apparatus 20 by the sheet conveying unit.
Further, the example in which the paper feed unit 10 is provided is described as the image forming system 1, but the present invention is not limited thereto, and the paper feed unit 10 may not be provided as the image forming system 1.
The image forming apparatus 20 forms an image on the fed sheet S based on the output job information and image data. The image forming apparatus 20 forms an image on the sheet S by, for example, an electrophotographic method. The image forming apparatus 20 includes a sheet conveying portion 230, an operation display panel 240, an image forming portion 270, a fixing portion 280, and an inversion conveying portion 290. The image forming apparatus 20 further includes a sheet detecting device 50 for detecting the type, thickness, and the like of the sheet S.
An operation display panel 240 indicating a report section is provided at an upper portion of the housing of the image forming apparatus 20. The operation display panel 240 is configured by overlapping a display panel and a touch panel (operation unit), and can be operated and displayed by a user.
The sheet conveying unit 230 conveys the sheet S fed from the sheet feeding unit 10 to the image forming unit 270, the fixing unit 280, the reversing and conveying unit 290, and the sheet discharge tray.
The image forming portion 270 includes, for example, image forming units of a plurality of colors (cyan, magenta, yellow, black, etc.), and can form a color toner image on a sheet. A fixing unit 280 for conveying the sheet on which the toner image is formed is disposed downstream of the image forming unit 270 in the sheet conveying direction.
The fixing unit 280 applies pressure and heat to the conveyed sheet S to fix the toner image transferred to the sheet S. The sheet S subjected to the fixing process by the fixing unit 280 is conveyed to the reversing and conveying unit 290 and the sheet discharge tray by the sheet conveying unit 230.
The reversing conveyance unit 290 is provided with a reversing unit for reversing the sheet S. The sheet S, which is turned back and forth or back and forth by the reversing section, is conveyed to the upstream side of the image forming section 270 or the downstream side of the fixing section 280 by the reversing conveyance section 290.
The sheet detection device 50 is disposed upstream in the sheet conveyance direction of the image forming unit 270 in the image forming apparatus 20. The portion where the sheet detection device 50 is provided is not limited to the above-described portion, and may be disposed in a discharge portion of a sheet feed tray that accommodates the sheet S in the image forming apparatus 20, for example.
The sheet detecting apparatus 50, which is an example of the recording medium detecting apparatus, conveys the sheet S conveyed from the sheet feeding unit 10 and the sheet feeding tray at the time of the sheet setting process, and detects a physical characteristic value of the sheet S. Further, the sheet detecting apparatus 50 outputs the detected detection information to the image forming apparatus 20.
The physical characteristic values of the sheet S detected by the sheet detecting device 50 are, for example, grammage, thickness, surface characteristics, substrate, color, and the like of the sheet S.
1-2 hardware architecture of each device
Next, the hardware configuration of each device will be described with reference to fig. 2.
Fig. 2 is a block diagram showing a hardware configuration of each device of the image forming system.
First, the hardware configuration of the paper feed unit 10 is described.
As shown in fig. 2, the paper feed unit 10 includes: control unit 100, communication unit 110, communication unit 120, paper transport unit 130, and memory 150.
The control unit 100 has, for example, a CPU (Central Processing Unit ). The control unit 100 is connected to the communication unit 110, the communication unit 120, the sheet conveying unit 130, and the memory 150 via a system bus, and controls the entire sheet feeding unit 10.
The memory 150 is a volatile memory such as a RAM or a large-capacity nonvolatile memory. The memory 150 stores a program or the like executed by the control section 100, and is used as a work area of the control section 100.
The communication unit 110 transmits and receives data to and from an external device (a client terminal, a management device server, or the like, a mobile terminal) of the image forming system 1. Further, communication unit 120 transmits and receives data to and from communication unit 210 of image forming apparatus 20.
Next, a hardware configuration of image forming apparatus 20 will be described.
The image forming apparatus 20 includes: the sheet detection apparatus includes a control section 200, a communication section 210, a sheet transport section 230, an operation display panel 240, a memory 250, an image processing section 260, an image forming section 270, a fixing section 280, a reverse transport section 290, and a sheet detection device 50.
The control unit 200, which represents the judgment unit, has, for example, a CPU (Central Processing Unit ). The control unit 200 is connected to the communication unit 210, the sheet conveying unit 230, the operation display panel 240, the memory 250, the image processing unit 260, the image forming unit 270, the fixing unit 280, and the reversing conveyance unit 290 via a system bus, and controls the entire image forming apparatus 20. The control unit 200 controls the paper feed unit 10 and the paper detection device 50 via the communication unit 210. That is, in this example, the control section 200 controls the entire image forming system 1.
The memory 250 representing the storage unit is a volatile memory such as a RAM or a large-capacity nonvolatile memory. The memory 250 stores a program or the like executed by the control section 200, and is used as a work area of the control section 200. The memory 250 stores paper setting information indicating the size and type of the set paper S. Examples of the items of the set sheet S include a base color, a sheet type, and a grammage of the sheet S.
The image processing unit 260 acquires image data from job information input from the outside, and performs image processing. The image processing unit 260 performs image processing such as shading correction (shading), image density adjustment, and image compression on the received image data as necessary under the control of the control unit 200. Then, the image data processed by the image processing section 260 is sent to the image forming section 270. The image forming unit 270 receives image data subjected to image processing by the image processing unit 260, and forms an image on the sheet S based on the image data.
The operation display panel 240 is a touch panel constituted by a display such as a liquid crystal display device (LCD) or an organic ELD (Electro Luminescence Display, electroluminescent display). The operation display panel 240 is an example of an output unit and an input unit, and displays an instruction menu for a user, information on acquired image data, and the like. The operation display panel 240 further includes a plurality of keys, receives various instructions, characters, numerals, and other data input by a user through key operations, and outputs an input signal to the control unit 200.
The paper detection device 50 has a 1 st detection unit 51 and a 2 nd detection unit 52. The 1 st detecting portion 51 conveys the sheet S and detects the thickness of the sheet S. The 2 nd detection unit 52 includes: a grammage detection unit 53 for detecting the grammage of the sheet S conveyed by the 1 st detection unit 51; and a surface characteristic detecting section 54 for detecting a surface characteristic. The information detected by the paper detection device 50 is sent to the control unit 200.
2. Structural example of paper sheet detection device
Next, referring to fig. 3 to 5, the structure of the paper detection device 50 will be described.
Fig. 3 is a schematic configuration diagram showing the paper sheet detection device 50, and fig. 4 and 5 are perspective views showing the 1 st detection unit 51.
As shown in fig. 3, the paper detection device 50 includes: the 1 st detecting unit 51, the 2 nd detecting unit 52, a plurality of conveying rollers 57, and a pair of guide plates 58, 58. The pair of guide plates 58, 58 are opposed to each other with a predetermined gap therebetween in the thickness direction orthogonal to the conveyance direction of the sheet S and also orthogonal to the width direction of the sheet S.
The 1 st detection unit 51 includes: a displacement detecting section 63; and a driving roller 61 and a driven roller 62 that pinch and convey the sheet. The driving roller 61 of the 1 st roller is driven to rotate by a driving unit not shown. The driven roller 62 of the second roller is biased toward the driving roller 61 by a biasing member 68 described later. The nip 64 is formed by the contact between the driving roller 61 and the driven roller 62.
The 1 st detection unit 51 detects the thickness of the sheet S based on the displacement of the driven roller 62 in the thickness direction when the sheet S is inserted into the nip 64 between the driving roller 61 and the driven roller 62. The 1 st detecting unit 51 conveys the sheet S toward the downstream side in the conveying direction by the driving roller 61 and the driven roller 62. The detailed configuration of the 1 st detection unit 51 will be described later.
The 2 nd detection unit 52 is disposed further downstream in the conveying direction than the 1 st detection unit 51. The 2 nd detection section 52 includes a light receiving section 71, a 1 st light emitting section 72, and a 2 nd light emitting section 73. The light receiving portion 71, the 1 st light emitting portion 72, and the 2 nd light emitting portion 73 are arranged with the pair of guide plates 58, 58 interposed therebetween, the light receiving portion 71 and the 1 st light emitting portion 72 being arranged on one side in the thickness direction, and the 2 nd light emitting portion 73 being arranged on the other side in the thickness direction. The 1 st light emitting portion 72 and the 2 nd light emitting portion 73 irradiate light toward the sheet S. The light receiving portion 71 receives light reflected at the sheet S and transmits the sheet S. Then, the 2 nd detecting section 52 detects the grammage and surface characteristics of the sheet S from the light receiving signal of the light receiving section 71.
As shown in fig. 4 and 5, the 1 st detection unit includes 2 driving rollers 61, 61 and 2 driven rollers 62, a displacement detection unit 63, a roller shaft 66, a shaft support 67, and a biasing member 68. The driving roller 61 and the driven roller 62 are disposed opposite to each other in the thickness direction of the sheet S. The 2 driving rollers 61, 61 are arranged at intervals in the width direction, and similarly, the 2 driven rollers 62, 62 are arranged at intervals in the width direction. The driving roller 61 and the driven roller 62 are disposed in the axial direction parallel to the width direction of the conveyed sheet S. The driven roller 62 is rotatably supported by a cylindrical roller shaft 66.
The roller shaft 66 is movably supported by a shaft support portion 67 provided on the guide plate 58. The roller shaft 66 is restricted from rotating by a rotation restricting member, not shown. The shaft support portion 67 has a support hole 67a for inserting the roller shaft 66. The support hole 67a is a long hole extending by a predetermined length in the thickness direction. Further, the roller shaft 66 is supported slidably in the thickness direction along the support hole 67a of the shaft support 67.
The length of the opening in the conveyance direction in the support hole 67a is set longer than the diameter of the roller shaft 66. Therefore, a slight gap is formed between the roller shaft 66 and the support hole 67a in the conveying direction. The roller shaft 66 is supported so as to be movable in the shaft support portion 67 by a predetermined length in the conveying direction through the support hole 67a.
The roller shaft 66 is biased toward the driving roller 61 by a biasing member 68. Thereby, the driven roller 62 supported by the roller shaft 66 is biased toward the driving roller 61. When the driving roller 61 is rotationally driven, the driven roller 62 also rotates together with the driving roller 61.
As the urging member 68, for example, a compression coil spring is applied. The biasing member 68 is not limited to a compression coil spring, and various other elastic members such as a leaf spring and rubber may be used.
The detection lever 81 of the displacement detection section 63 abuts on the roller shaft 66. The displacement detection portion 63 includes a detection lever 81 that abuts on the roller shaft 66, and a support portion 82 for supporting the detection lever 81. The portion of the detection lever 81 that contacts the roller shaft 66 is formed in a substantially circular arc shape. The detection lever 81 is rotatably supported by the support 82 via a rotation shaft 81 a. When the roller shaft 66 moves in the thickness direction, the detection lever 81 rotates about the support portion 82. The displacement detecting section 63 detects the thickness of the sheet S based on the rotation angle of the detecting lever 81.
In this example, the thickness of the sheet S is detected based on the rotation angle of the detection lever 81, but the present invention is not limited to this. As the displacement detecting section 63, a measuring instrument or other various members that detects displacement of the roller shaft 66 in the thickness direction may be applied.
Further, the example in which the roller shaft 66 is applied as the displacement member and the detection lever 81 is brought into contact with the roller shaft 66 has been described, but the present invention is not limited thereto. For example, a linking member that is displaced in the conveyance direction and the thickness direction together with the roller shaft 66 may be used as the displacement member. The displacement detecting unit 63 may be configured to bring the detecting lever 81 into contact with the interlocking member and detect the displacement of the driven roller 62 in the thickness direction based on the displacement of the interlocking member.
As described above, the roller shaft 66 is supported by the shaft support portion 67 so as to be movable not only in the thickness direction but also in the conveying direction. Therefore, when the sheet S enters the nip 64 between the driving roller 61 and the driven roller 62, the driven roller 62 and the roller shaft 66 move in the conveying direction following the sheet S. Accordingly, the load generated when the sheet S enters the nip 64 can be absorbed by the movement of the driven roller 62 in the conveying direction. As a result, occurrence of a jam in the nip portion 64 between the driving roller 61 and the driven roller 62 can be suppressed.
Fig. 6 and 7 are explanatory views showing a state in which the roller shaft 66 is displaced in the conveying direction.
As shown in fig. 6, when the roller 66 moves in the conveyance direction, the roller 66 is formed in a cylindrical shape, and therefore the position in the thickness direction at the detection point P1 where the roller 66 and the detection lever 81 are in contact with each other changes. As a result, the detection lever 81 is accidentally turned, and the accuracy of detecting the thickness of the sheet S in the 1 st detection portion 51 is lowered.
Accordingly, in the sheet detecting device 50 of the present example, as shown in fig. 4 and 5, the flat surface portion 66a is formed at a position on the outer peripheral surface of the roller shaft 66 where the detecting lever 81 abuts. The flat portion 66a is formed by cutting a part of the outer peripheral surface of the roller shaft 66 into a flat shape. The planar portion 66a is formed parallel to the conveyance direction of the sheet S. Thus, the planar portion 66a is orthogonal to the thickness direction.
The length of the planar portion 66a in the conveying direction is set longer than the gap between the roller 66 and the support hole 67a in the conveying direction. That is, the length of the planar portion 66a in the conveying direction is set longer than the length of the roller shaft 66 that can move in the conveying direction. Thus, even if the roller shaft 66 moves maximally in the conveying direction, the detection lever 81 is still located on the planar portion 66a. Even if the roller shaft 66 moves in the conveying direction, the position of the detection point in the thickness direction does not change, so the detection lever 81 does not rotate. This can improve the detection accuracy in the paper detection device 50.
In addition, when an interlocking member interlocking with the roller shaft 66 is applied as the displacement member, the flat surface portion 66a is provided to the interlocking member.
Fig. 8 and 9 are explanatory diagrams showing the positional relationship of the driven roller 62, the urging member 68, and the detection point P1.
As shown in fig. 8, the roller shaft 66 is biased toward the driving roller 61 by the biasing member 68. When the relatively thick sheet S is inserted into the nip 64, the force F2 is applied in a direction away from the driving roller 61 via the driven roller 62. When the urging member 68 is disposed on the outer side of the 2 driven rollers 62, 62 of the roller shaft 66 in the axial direction, that is, on the outer side in the width direction, there is a possibility that the intermediate portion of the 2 driven rollers 62, 62 of the roller shaft 66 may be greatly deflected or warped.
Therefore, the detection point P1 at which the detection lever 81 abuts against the roller shaft 66 is preferably disposed on the opposite side of the urging member 68 with the driven roller 62 interposed therebetween, that is, in the vicinity of the driven roller 62 on the inner side of the driven roller 62 in the axial direction. The detection point P1 is disposed within a range of a predetermined distance T1 from the urging member 68 in the axial direction of the roller shaft 66, the predetermined distance T1 being a distance at which the influence of the deflection or warpage of the roller shaft 66 does not act.
As shown in fig. 9, when the urging member 68 is disposed on the inner side of the 2 driven rollers 62, 62 in the axial direction, the detection point P1 is disposed in the vicinity of the driven roller 62 on the outer side of the driven roller 62 in the axial direction. In the example shown in fig. 9, the detection point P1 is also disposed within a range of a predetermined distance T1 from the urging member 68 in the axial direction of the roller shaft 66, the predetermined distance T1 being a distance at which the influence of the deflection or warpage of the roller shaft 66 does not act.
The shorter the predetermined distance T1, the less susceptible the deflection and warpage of the roller shaft 66 at the detection point P1.
In the 1 st detection unit 51, the detection lever 81 provided with one displacement detection unit 63 and the detection point P1 on the roller shaft 66 as the displacement member are described as being only 1 part, but the present invention is not limited thereto. For example, a plurality of detection bars 81 may be provided, a plurality of detection points P1 may be set on the roller shaft 66, and the displacement of the driven roller 62 in the thickness direction may be detected based on an average value of the plurality of detection points P1.
The embodiment and the operational effects thereof are described above. However, the present invention is not limited to the above embodiment examples, and various modifications can be made without departing from the gist of the invention described in the claims.
In the above embodiment, the configuration was described in which a color image was formed using 4 sets of image forming units, but as the image forming apparatus of the present invention, a configuration in which a monochrome image was formed using 1 image forming unit may be employed.
The display unit for displaying the detection result of the paper detection device 50 is not limited to the operation display panel 240, and a display unit of an external device (a client terminal, a management device server, or the like, a mobile terminal) that outputs job information to the image forming apparatus 20 may be used.
In addition, part or all of the above-described components, functions, processing units, and the like may be realized by hardware, for example, by an integrated circuit design. The above-described components, functions, and the like may be implemented in software by a processor interpreting and executing a program for realizing the respective functions. Information such as programs, tables, and files for realizing the respective functions can be provided in a recording device such as a memory, a hard disk, and an SSD (Solid State Drive, solid state disk), or a recording medium such as an IC card, an SD card, and a DVD.
The example of applying paper as the recording medium has been described, but the present invention is not limited thereto, and other various media such as films and cloths can be applied as the recording medium.
In the present specification, terms such as "parallel" and "orthogonal" are used, but these terms do not merely mean strictly "parallel" and "orthogonal", but include "parallel" and "orthogonal", and may be "substantially parallel" and "substantially orthogonal" in a range where the functions thereof can be exhibited.

Claims (11)

1. A recording medium detection apparatus includes:
a 1 st roller and a 2 nd roller for holding and conveying the recording medium;
a roller shaft rotatably supporting the 2 nd roller;
a shaft support portion that supports the 2 nd roller via the roller shaft so as to be movable in a thickness direction of the recording medium; and
a displacement detecting section for detecting a displacement of the 2 nd roller in a thickness direction of the recording medium,
the shaft supporting portion further supports the 2 nd roller via the roller shaft so as to be movable in the conveying direction of the recording medium,
the shaft supporting part has a supporting hole into which the roller shaft is inserted,
the support hole is a long hole extending by a predetermined length in a thickness direction of the recording medium,
the length of the opening of the support hole in the conveying direction is set to be longer than the diameter of the roller shaft.
2. The recording medium detecting apparatus according to claim 1, wherein,
the recording medium detecting device has a displacement member that moves together with the 2 nd roller in the thickness direction of the recording medium and the conveying direction,
the displacement detecting unit detects the displacement of the 2 nd roller based on the displacement of the displacement member in the thickness direction of the recording medium.
3. The recording medium detecting apparatus according to claim 2, wherein,
a flat portion parallel to the conveying direction is formed at a portion of the displacement member where the displacement is detected by the displacement detecting portion.
4. The recording medium detecting apparatus according to claim 3, wherein,
the displacement detection unit has a detection lever that abuts against the planar portion, and a support unit that rotatably supports the detection lever, and detects the displacement of the 2 nd roller based on the rotation angle of the detection lever.
5. The recording medium detecting apparatus according to claim 3 or 4, wherein,
the length of the planar portion in the conveying direction is set longer than a range in which the roller shaft can move in the conveying direction.
6. The recording medium detection apparatus according to any one of claims 2 to 4, wherein,
the displacement member is the roller shaft.
7. The recording medium detecting apparatus according to claim 6, wherein,
the recording medium detection apparatus further includes a rotation restriction member for restricting a rotation operation of the roller shaft.
8. The recording medium detecting apparatus according to claim 6, wherein,
the recording medium detecting apparatus further includes a biasing member for biasing the roller shaft toward the 1 st roller,
the detection point of the displacement detection unit for detecting the displacement of the roller shaft is disposed at a position separated from the urging member by a predetermined distance.
9. The recording medium detecting apparatus according to claim 7, wherein,
the recording medium detecting apparatus further includes a biasing member for biasing the roller shaft toward the 1 st roller,
the detection point of the displacement detection unit for detecting the displacement of the roller shaft is disposed at a position separated from the urging member by a predetermined distance.
10. The recording medium detecting apparatus according to claim 8, wherein,
the detection point is disposed on the opposite side of the urging member with the 2 nd roller interposed therebetween.
11. An image forming apparatus includes:
an image forming unit that forms an image on a recording medium; and
a recording medium detecting device disposed upstream of the image forming section in a conveying direction of the recording medium, for detecting the recording medium,
the recording medium detection apparatus includes:
a 1 st roller and a 2 nd roller for holding and conveying the recording medium;
a roller shaft rotatably supporting the 2 nd roller;
a shaft support portion that supports the 2 nd roller via the roller shaft so as to be movable in a thickness direction of the recording medium; and
a displacement detecting section for detecting a displacement of the 2 nd roller in a thickness direction of the recording medium,
the shaft supporting portion further supports the 2 nd roller via the roller shaft so as to be movable in the conveying direction of the recording medium,
the shaft supporting part has a supporting hole into which the roller shaft is inserted,
the support hole is a long hole extending by a predetermined length in a thickness direction of the recording medium,
the length of the opening of the support hole in the conveying direction is set to be longer than the diameter of the roller shaft.
CN202010933991.4A 2019-09-12 2020-09-08 Recording medium detection apparatus and image forming apparatus Active CN112485988B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019165830A JP7351154B2 (en) 2019-09-12 2019-09-12 Recording medium detection device and image forming device
JP2019-165830 2019-09-12

Publications (2)

Publication Number Publication Date
CN112485988A CN112485988A (en) 2021-03-12
CN112485988B true CN112485988B (en) 2024-04-16

Family

ID=74862069

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010933991.4A Active CN112485988B (en) 2019-09-12 2020-09-08 Recording medium detection apparatus and image forming apparatus

Country Status (3)

Country Link
US (1) US20210078813A1 (en)
JP (1) JP7351154B2 (en)
CN (1) CN112485988B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023084232A (en) * 2021-12-07 2023-06-19 コニカミノルタ株式会社 Sheet physical property detection device, image forming device, sheet physical property detection method, and control program

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010202347A (en) * 2009-03-03 2010-09-16 Ricoh Co Ltd Sheet material thickness detection device, sheet material conveying device, and image forming device
JP2012166913A (en) * 2011-02-15 2012-09-06 Ricoh Co Ltd Sheet thickness detecting device and image forming apparatus and image reading device equipped with the same
CN106027839A (en) * 2015-03-26 2016-10-12 柯尼卡美能达株式会社 Reading apparatus, image forming apparatus and image forming system
JP2017128424A (en) * 2016-01-21 2017-07-27 コニカミノルタ株式会社 Sheet conveyance apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61206757A (en) * 1985-03-08 1986-09-13 Canon Inc Sheet material feeding device
US8496246B2 (en) * 2007-08-31 2013-07-30 Glory Ltd. Thickness detector of paper
US8091889B2 (en) * 2007-08-31 2012-01-10 Glory Ltd. Thickness detector of paper
JP5162692B2 (en) * 2011-06-28 2013-03-13 Ｎｅｃアクセステクニカ株式会社 Double-sided document conveying device and document conveying method of double-sided document conveying device
JP6202357B2 (en) * 2012-07-11 2017-09-27 株式会社リコー Sheet material thickness detection apparatus and image forming apparatus using the same
JP6286822B2 (en) * 2012-12-25 2018-03-07 株式会社リコー Multifeed determination device, image forming apparatus, multifeed determination method, and multifeed determination method program
JP2015013719A (en) * 2013-07-04 2015-01-22 株式会社リコー Sheet material thickness detection device and image forming apparatus using same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010202347A (en) * 2009-03-03 2010-09-16 Ricoh Co Ltd Sheet material thickness detection device, sheet material conveying device, and image forming device
JP2012166913A (en) * 2011-02-15 2012-09-06 Ricoh Co Ltd Sheet thickness detecting device and image forming apparatus and image reading device equipped with the same
CN106027839A (en) * 2015-03-26 2016-10-12 柯尼卡美能达株式会社 Reading apparatus, image forming apparatus and image forming system
JP2017128424A (en) * 2016-01-21 2017-07-27 コニカミノルタ株式会社 Sheet conveyance apparatus

Also Published As

Publication number Publication date
US20210078813A1 (en) 2021-03-18
JP7351154B2 (en) 2023-09-27
CN112485988A (en) 2021-03-12
JP2021042049A (en) 2021-03-18

Similar Documents

Publication Publication Date Title
US11356574B2 (en) Image reading apparatus
EP2835689B1 (en) Printing apparatus, information processing apparatus, printing apparatus control method, and storage medium
CN101382765B (en) Image forming apparatus
JP2014061957A (en) Paper sheet conveying device
JP6421877B2 (en) Image forming apparatus
CN112485988B (en) Recording medium detection apparatus and image forming apparatus
JP2012166913A (en) Sheet thickness detecting device and image forming apparatus and image reading device equipped with the same
CN112485987B (en) Recording medium detection apparatus and image forming apparatus
US20220201127A1 (en) Image scanner, image forming apparatus, and image forming method
US20120228819A1 (en) Sheet feeding apparatus
US11383952B2 (en) Sheet stacker having movable arms maintaining stack quality
US11345559B2 (en) Sheet conveyance device and image forming apparatus
JP2019182590A (en) Sheet feeder and sheet processing apparatus, and image reading apparatus
JP5308924B2 (en) Paper transport mechanism
JP7540217B2 (en) Feeding device and image forming device
JP7480522B2 (en) Image forming device
US20210155443A1 (en) Sheet binding device and image forming apparatus
US9233811B1 (en) Image forming apparatus
JP2015101446A (en) Sheet conveying device
JP2012148852A (en) Sheet transport device, sheet transport control method, and printer
JP2021126831A (en) Image formation device, image formation system, sheet processing method, and program
US20180241897A1 (en) Image processing apparatus
JP2019081207A (en) Sheet material processing apparatus and image forming system
CN115783824A (en) Image forming apparatus with a toner supply device
JP2018008815A (en) Sheet inclination correction device and image formation apparatus

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant